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'use strict';

// Array🎉

// 1. Declaration

const arr1 = new Array();

const arr2 = [1, 2];

// 2. Index position

const fruits = ['🍎', '🍌'];

console.log(fruits);

console.log(fruits.length);

console.log(fruits[0]);

console.log(fruits[1]);

console.log(fruits[2]);

console.log(fruits[fruits.length - 1]);

console.clear();

// 3. Looping over an array

// print all fruits

// a. for

for (let i = 0; i < fruits.length; i++) {

console.log(fruits[i]);

}

// b. for of

for (let fruit of fruits) {

console.log(fruit);

}

// c. forEach

fruits.forEach((fruit) => console.log(fruit));

// 4. Addtion, deletion, copy

// push: add an item to the end

fruits.push('🍓', '🍑');

console.log(fruits);

// pop: remove an item from the end

const poped = fruits.pop();

fruits.pop();

console.log(fruits);

// unshift: add an item to the benigging

fruits.unshift('🍓', '🍋');

console.log(fruits);

// shift: remove an item from the benigging

fruits.shift();

fruits.shift();

console.log(fruits);

// note!! shift, unshift are slower than pop, push

// splice: remove an item by index position

fruits.push('🍓', '🍑', '🍋');

console.log(fruits);

fruits.splice(1, 1);

console.log(fruits);

fruits.splice(1, 0, '🍏', '🍉');

console.log(fruits);

// combine two arrays

const fruits2 = ['🍐', '🥥'];

const newFruits = fruits.concat(fruits2);

console.log(newFruits);

// 5. Searching

// indexOf: find the index

console.clear();

console.log(fruits);

console.log(fruits.indexOf('🍎'));

console.log(fruits.indexOf('🍉'));

console.log(fruits.indexOf('🥥'));

// includes

console.log(fruits.includes('🍉'));

console.log(fruits.includes('🥥'));

// lastIndexOf

console.clear();

fruits.push('🍎');

console.log(fruits);

console.log(fruits.indexOf('🍎'));

console.log(fruits.lastIndexOf('🥥'));